hi, there is/was a (known) error with PNG without alpha channel, which was fixed with version storyline 3.63
April 20, 2022 (Build 3.63.27628.0) Fixed: We improved how Storyline 360 handles images during import and in the published output, resulting in crisper images.
the error was the wrong import of PNG images (without alpha channel)
PNG -> import (as lossy jpg ) -> publish as PNG (with alpha channel) in decreased quality
how to test -> test_image.story : export '2022-06-14_144527.png' from the media library and test the file onhttps://www.metadata2go.com/
result:
=> quality of all PNG images is (jpg) lossy !!!
there was no problem with PNG with alpha channel
there is no easy fix for 'old' projects - you have to re-import all affected PNG Jürgen
ps: before the fix it was only possible to extend png with an (empty) alpha channel and then import it in storyline